INTERPLAY OF SUPERCONDUCTIVITY WITH MAGNETISM IN 2-DIMENSIONAL ORGANIC SALTS

The Fermi surface studies of layered BEDT-TTF salts have shown that so me of them possess two kinds of bands; quasi 1D and 2D bands. The latt er may work for superconductivity while the former for SDW. The interp lay of the superconductivity with the magnetic ordering based on diffe rent Fermi surfaces have emerged as intriguing subjects in (BEDT-TTF)2 MHg(SCN)4 (M = NH4, K, Tl, Rb), and in (BEDT-TTF)2Cu[N(CN)2]Cl, where the interplay appears in different manners. They are compared to the c ases for ternary and actinide compounds.